Revert of Deletes mojo::Callback

device/usb/mojo/device_manager_impl.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef DEVICE_USB_MOJO_DEVICE_MANAGER_IMPL_H_
 #define DEVICE_USB_MOJO_DEVICE_MANAGER_IMPL_H_
 
 #include <memory>
 #include <queue>
 #include <set>
 
-#include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/scoped_observer.h"
 #include "device/usb/public/interfaces/device_manager.mojom.h"
 #include "device/usb/usb_service.h"
 #include "mojo/public/cpp/bindings/array.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 
@@ skipping 16 matching lines @@
 class DeviceManagerImpl : public DeviceManager, public UsbService::Observer {
  public:
   static void Create(base::WeakPtr<PermissionProvider> permission_provider,
                      mojo::InterfaceRequest<DeviceManager> request);
 
   DeviceManagerImpl(base::WeakPtr<PermissionProvider> permission_provider,
                     UsbService* usb_service,
                     mojo::InterfaceRequest<DeviceManager> request);
   ~DeviceManagerImpl() override;
 
-  void set_connection_error_handler(const base::Closure& error_handler) {
+  void set_connection_error_handler(const mojo::Closure& error_handler) {
     connection_error_handler_ = error_handler;
   }
 
  private:
   // DeviceManager implementation:
   void GetDevices(EnumerationOptionsPtr options,
                   const GetDevicesCallback& callback) override;
   void GetDevice(const mojo::String& guid,
                  mojo::InterfaceRequest<Device> device_request) override;
   void SetClient(DeviceManagerClientPtr client) override;
 
   // Callbacks to handle the async responses from the underlying UsbService.
   void OnGetDevices(EnumerationOptionsPtr options,
                     const GetDevicesCallback& callback,
                     const std::vector<scoped_refptr<UsbDevice>>& devices);
 
   // UsbService::Observer implementation:
   void OnDeviceAdded(scoped_refptr<UsbDevice> device) override;
   void OnDeviceRemoved(scoped_refptr<UsbDevice> device) override;
   void WillDestroyUsbService() override;
 
   void MaybeRunDeviceChangesCallback();
 
   base::WeakPtr<PermissionProvider> permission_provider_;
 
   UsbService* usb_service_;
   ScopedObserver<UsbService, UsbService::Observer> observer_;
   DeviceManagerClientPtr client_;
 
-  base::Closure connection_error_handler_;
+  mojo::Closure connection_error_handler_;
 
   mojo::StrongBinding<DeviceManager> binding_;
   base::WeakPtrFactory<DeviceManagerImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceManagerImpl);
 };
 
 }  // namespace usb
 }  // namespace device
 
 #endif  // DEVICE_USB_MOJO_DEVICE_MANAGER_IMPL_H_